136 lines
4.4 KiB
Objective-C
136 lines
4.4 KiB
Objective-C
/*
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* Copyright [2019] [Doric.Pub]
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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//
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// DoricVLayoutNode.m
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// Doric
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//
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// Created by pengfei.zhou on 2019/7/30.
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//
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#import "DoricVLayoutNode.h"
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#import "DoricUtil.h"
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@implementation DoricVLayoutNode
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- (instancetype)init {
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if (self = [super init]) {
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_space = 0;
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_gravity = 0;
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}
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return self;
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}
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- (void)blendView:(id)view forPropName:(NSString *)name propValue:(id)prop {
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if ([name isEqualToString:@"gravity"]) {
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self.gravity = [(NSNumber *) prop integerValue];
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} else if ([name isEqualToString:@"space"]) {
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self.space = [(NSNumber *) prop floatValue];
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} else {
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[super blendView:view forPropName:name propValue:prop];
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}
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}
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- (void)blendChild:(DoricViewNode *)child layoutConfig:(NSDictionary *)layoutconfig {
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[super blendChild:child layoutConfig:layoutconfig];
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if (![child.layoutParams isKindOfClass:VHLayoutParams.class]) {
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DoricLog(@"blend VLayout child error,layout params not match");
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return;
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}
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VHLayoutParams *params = (VHLayoutParams *) child.layoutParams;
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NSDictionary *margin = layoutconfig[@"margin"];
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if (margin) {
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params.margin.top = [(NSNumber *) margin[@"top"] floatValue];
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params.margin.left = [(NSNumber *) margin[@"left"] floatValue];
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params.margin.right = [(NSNumber *) margin[@"right"] floatValue];
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params.margin.bottom = [(NSNumber *) margin[@"bottom"] floatValue];
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}
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NSNumber *alignment = layoutconfig[@"alignment"];
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if (alignment) {
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params.alignment = [alignment integerValue];
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}
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}
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- (LayoutParams *)generateDefaultLayoutParams {
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return [[VHLayoutParams alloc] init];
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}
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- (void)measureByParent:(DoricGroupNode *)parent {
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DoricLayoutDesc widthSpec = self.layoutParams.width;
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DoricLayoutDesc heightSpec = self.layoutParams.height;
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CGFloat maxWidth = 0, maxHeight = 0;
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for (DoricViewNode *child in self.indexedChildren) {
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[child measureByParent:self];
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CGFloat placeWidth = child.measuredWidth;
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CGFloat placeHeight = child.measuredHeight;
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maxWidth = MAX(maxWidth, placeWidth);
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maxHeight += placeHeight + self.space;
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}
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maxHeight -= self.space;
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self.desiredWidth = maxWidth;
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self.desiredHeight = maxHeight;
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if (widthSpec == LAYOUT_WRAP_CONTENT) {
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self.width = maxWidth;
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}
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if (heightSpec == LAYOUT_WRAP_CONTENT) {
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self.height = maxHeight;
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}
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}
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- (void)layoutByParent:(DoricGroupNode *)parent {
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if (self.layoutParams.width == LAYOUT_MATCH_PARENT) {
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self.width = parent.width;
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}
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if (self.layoutParams.height == LAYOUT_MATCH_PARENT) {
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self.height = parent.height;
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}
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// layout child
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CGFloat yStart = 0;
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if ((self.gravity & TOP) == TOP) {
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yStart = 0;
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} else if ((self.gravity & BOTTOM) == BOTTOM) {
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yStart = self.height - self.desiredHeight;
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} else if ((self.gravity & CENTER_Y) == CENTER_Y) {
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yStart = (self.height - self.desiredHeight) / 2;
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}
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for (DoricViewNode *child in self.indexedChildren) {
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if (child.layoutParams.width == LAYOUT_MATCH_PARENT) {
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child.width = self.width;
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}
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if (child.layoutParams.height == LAYOUT_MATCH_PARENT) {
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child.height = self.height;
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}
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if ([child.layoutParams isKindOfClass:VHLayoutParams.class]) {
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VHLayoutParams *layoutParams = (VHLayoutParams *) child.layoutParams;
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DoricGravity gravity = layoutParams.alignment | self.gravity;
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if ((gravity & LEFT) == LEFT) {
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child.left = 0;
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} else if ((gravity & RIGHT) == RIGHT) {
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child.right = self.width;
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} else if ((gravity & CENTER_X) == CENTER_X) {
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child.centerX = self.width / 2;
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}
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}
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child.top = yStart;
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yStart = child.bottom + self.space;
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[child layoutByParent:self];
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}
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}
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@end
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